9. You need to estimate the work involved in a multi-step process cycle involving a dense, clearly nonideal gas. To a very good approximation, however, the heat capacity for this gas is constant with temperature. For each of the following equations, indicate whether or not you can use it for your calculations: (a) W/N=kBTln(V2/V1) for an isothermal step (b) E=CVT for an isobaric step (c) H=E+VP for an isochoric step (d) Q=CPT for an isobaric step